ENERGY STAR cold-climate list

Lennox cold-climate mini-splits

The short answer

Lennox has 237 ENERGY STAR cold-climate certified system combinations. The median one is rated 20,000 BTU/h at 5°F, which is 80% of its 47°F capacity (the all-brand median is 88%), with a median HSPF2 of 10. Among the 80 brands with 50+ systems, it ranks #59 for keeping capacity in the cold.

237Certified systems

69Outdoor models

10Median HSPF2 (best 13.6)

1.9Median COP at 5°F

209ENERGY STAR Most Efficient listings

Capacity as it gets colder

Solid dots: 5°F and 47°F medians, joined by the straight line our model uses. Open dot: the 17°F median as reported, which is a separate test condition and often falls below the 5°F maximum-capacity figure.

Across the 237 systems, 5°F capacity runs from 7,000 to 54,000 BTU/h, so the model matters more than the badge. Refrigerants used: R-32, R-410A, R-454B.

Highest-HSPF2 Lennox systems

Top 12 unique outdoor + indoor pairings by HSPF2
Outdoor model	Indoor model	HSPF2	BTU/h 47°F	BTU/h 17°F	BTU/h 5°F	COP 5°F	AHRI ref
MPC009S4S-1P	MWMC006S4-*P	13.6	7,000	8,500	7,500	2.1	213257710
MPC009S4S-1P	MWMC006S4-2P	13.6	7,000	8,500	7,500	2.1	213199199
MPC009S4S-1P	MWMC009S4-1P	12.3	10,000	8,500	7,500	2.17	207683497
MLB048S4S-1P	MMDB048S4-2P	12	52,000	50,000	50,000	2.02	205782161
MLB009S4S-1P	MMDB009S4-2P	12	10,000	10,100	10,800	1.9	207683524
MLB009S4S-1P	MMDB009S4-*P	12	10,000	10,100	10,800	1.9	211034444
MLB009S4S-1P	MMDB009S4*	12	10,000	10,100	10,800	1.9	210665631
MPC009S4S-1P	MWMC009S4*	11.9	10,000	8,500	7,500	2.17	210665603
MPC009S4S-1P	MWMC009S4-*P	11.9	10,000	8,500	7,500	2.17	211034416
MLB024S4S-1P	M33C024S4-1P	11.5	25,000	21,000	25,800	2	207683534
MLB024S4S-1P	M33C024S4-*P	11.5	25,000	21,000	25,800	2	211034458
MLB024S4S-1P	M33C024S4*	11.5	25,000	21,000	25,800	2	210665645

Check the AHRI reference at ahridirectory.org before buying. We do not list prices: none of our sources publishes them.

Keep going

Put your ZIP into the cost-to-heat calculator to see what a median cold-climate system would cost to run where you live.
Sizing: how many BTU/h you need at your design temperature, compared with the 5°F capacity above.
Incentives and rebates and DIY vs installed for the buying decision.
Compare with similar brands: Innovair, GREE, TOSOT, Mitsubishi Electric.

Questions people ask

How many Lennox mini-splits are ENERGY STAR cold-climate certified?

Lennox has 237 certified cold-climate system combinations across 69 outdoor models in the EPA's ENERGY STAR mini-split list, first certified 2025-02-20 and most recently 2026-06-29.

How well do Lennox units heat at 5°F?

The median Lennox system is rated 20,000 BTU/h at 5°F against 25,000 BTU/h at 47°F, or 80% (the all-brand median is 88%). Median COP at 5°F is 1.9.